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Deprecated: Implicit conversion from float 265.2 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 J+Immunol 2021 ; 207 (5): 1344-1356 Nephropedia Template TP
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Protracted yet Coordinated Differentiation of Long-Lived SARS-CoV-2-Specific CD8(+) T Cells during Convalescence #MMPMID34389625
Ma T; Ryu H; McGregor M; Babcock B; Neidleman J; Xie G; George AF; Frouard J; Murray V; Gill G; Ghosn E; Newell EW; Lee SA; Roan NR
J Immunol 2021[Sep]; 207 (5): 1344-1356 PMID34389625show ga
CD8(+) T cells can potentiate long-lived immunity against COVID-19. We screened longitudinally-sampled convalescent human donors against SARS-CoV-2 tetramers and identified a participant with an immunodominant response against residues 322 to 311 of nucleocapsid (Nuc(322-331)), a peptide conserved in all variants of concern reported to date. We conducted 38-parameter cytometry by time of flight on tetramer-identified Nuc(322-331)-specific CD8(+) T cells and on CD4(+) and CD8(+) T cells recognizing the entire nucleocapsid and spike proteins, and took 32 serological measurements. We discovered a coordination of the Nuc(322-331)-specific CD8(+) T response with both the CD4(+) T cell and Ab pillars of adaptive immunity. Over the approximately six month period of convalescence monitored, we observed a slow and progressive decrease in the activation state and polyfunctionality of Nuc(322-331)-specific CD8(+) T cells, accompanied by an increase in their lymph node-homing and homeostatic proliferation potential. These results suggest that following a typical case of mild COVID-19, SARS-CoV-2-specific CD8(+) T cells not only persist but continuously differentiate in a coordinated fashion well into convalescence into a state characteristic of long-lived, self-renewing memory.